So far as I was concerned, the entire episode was a spoiler.
As soon as the handsome hit man turned around, I suspected he was the young wife's paramour.
As soon as she saw and reacted to him, I KNEW he was the one.
As soon as he learned that the wife would inherit everything, I knew what he was going to do.
I blame it on bad direction.
The writing was solid enough, but the actors "telegraphed" all over the place.
Direction was not as subtle as it should have been.
At least the script held the revelation of the hit man's sensitive side for the very end.
I also took exception to Hitchcock's disclaimer at the end, but I suspect the Hayes office had something to do with that. It would appear that the murderer WOULD get away with it, being a professional and all, but at the time, TV had to demonstrate that "crime does not pay"--even though ti sometimes does.